"Wed, 14 Jan 1970 11:04:40"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700114
Only TIME
11:04:40
General datetime
1970-01-14 11:04:40Z
For Database
1970-01-14 11:04:40
For HTTP1.1
Wed, 14 Jan 1970 11:04:40 GMT